Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/debug/GrTextureUnitObj.h

Index: src/gpu/gl/debug/GrTextureUnitObj.h
diff --git a/src/gpu/gl/debug/GrTextureUnitObj.h b/src/gpu/gl/debug/GrTextureUnitObj.h
new file mode 100644
index 0000000000000000000000000000000000000000..5c7a03980bde05ae3364fca4e5c0888a1edd08c5
--- /dev/null
+++ b/src/gpu/gl/debug/GrTextureUnitObj.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrTextureUnitObj_DEFINED
+#define GrTextureUnitObj_DEFINED
+
+#include "GrFakeRefObj.h"
+class GrTextureObj;
+
+////////////////////////////////////////////////////////////////////////////////
+// Although texture unit objects are allocated & deallocated like the other
+// GL emulation objects they are derived from GrFakeRefObj to provide some
+// uniformity in how the debug interface class manages resources
+class GrTextureUnitObj : public GrFakeRefObj {
+    GR_DEFINE_CREATOR(GrTextureUnitObj);
+
+public:
+    GrTextureUnitObj()
+        : GrFakeRefObj()
+        , fNumber(0)
+        , fTexture(nullptr) {
+    }
+
+    void setNumber(GrGLenum number) {
+        fNumber = number;
+    }
+    GrGLenum getNumber() const { return fNumber; }
+
+    void setTexture(GrTextureObj *texture);
+    GrTextureObj *getTexture()                  { return fTexture; }
+
+protected:
+private:
+    GrGLenum fNumber;
+    GrTextureObj *fTexture;
+
+    typedef GrFakeRefObj INHERITED;
+};
+
+#endif // GrTextureUnitObj_DEFINED